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947340-32-1

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947340-32-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 947340-32-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,7,3,4 and 0 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 947340-32:
(8*9)+(7*4)+(6*7)+(5*3)+(4*4)+(3*0)+(2*3)+(1*2)=181
181 % 10 = 1
So 947340-32-1 is a valid CAS Registry Number.

947340-32-1Relevant articles and documents

Synthesis of dibenzo[b,d]pyran-6-ones based on [3 + 3] cyclizations of 1,3-bis(silyl enol ethers) with 3-silyloxy-2-en-1-ones

Hussain, Ibrar,Nguyen, Van Thi Hong,Yawer, Mirza Arfan,Dang, Tuan Thanh,Fischer, Christine,Reinke, Helmut,Langer, Peter

, p. 6255 - 6258 (2008/02/09)

(Chemical Equation Presented) Functionalized dibenzo[b,d]pyran-6-ones were prepared by formal [3 + 3] cyclization of 1,3-bis(silyl enol ethers) with 3-silyloxy-2-en-1-ones or 1,1-diacetylcyclopropane to give functionalized salicylates, Suzuki cross-coupling reactions of the corresponding triflates, and subsequent BBr3-mediated lactonization. A second approach to dibenzo[b,d]pyran-6-ones relies on the [3 + 3] cyclization of 1,3-bis(silyl enol ethers) with 1-(2-methoxyphenyl)-1-(trimethylsilyloxy)alk-1-en-3-ones and subsequent BBr3-mediated lactonization.

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